Removing Write-protection for a Disk.

In most cases a VSS compliant Backup program, unexpected disconnection of SAN disk or malfunction of RAID controller can causes Windows Operating System to mark the disk as write-protected to maintain integrity of the data. In such cases, the disk can be accessible only in read-only mode.

As shown in the screenshot below, NEW tab missing when you right click to create new folder. 

Check disk shows “The disk is write protected.”

To clear read-only attribute,

Open command prompt by clicking start ->Run and type cmd

Type Diskpart.exe

 This command will open diskpart utility in another window as shown below.

On the prompt, type LIST DISK 

Select the Disk you wanted to modify by typing  SELECT Disk 0 (in my case it is disk 0)

Type DETAIL DISK to get the disk details

Notice that the Read-only is set to yes.

To change the read-only attribute, type ATTR DISK CLEAR READONLY

 Type DETAIL DISK again to confirm that the read-only attribute is changes to NO. 

The write protection is removed, NEW tab is back and you can create folder now

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About Jayachandran PK
My passion is for Microsoft technologies and how if properly implemented, they can provide actual value for an organization especially in the field of infrastructure, virtualization and system monitoring. I work for the biggest Microsoft partner in Kuwait, specialized in project consultation and implementation services for enterprise clients. When I'm not at work, I try to contribute back through a charitable organization dedicated to prompting cultural values of Kerala. In my free time, I dabble in gardening and am also an avid solar power aficionado.

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